Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Hornblende Root Name Group from
Hale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA


Locality type:Prospect
Classification
Species:'Hornblende Root Name Group' (not an IMA approved species)
Formula:◻Ca2(C42+C3+)(AlSi7O22)W2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Hornblende Root Name Group data
Locality Data:Click here to view Hale-Walker prospects, Collins Hill, Portland, Middlesex County, Connecticut, USA
Data Identifiers
Mindat Occurrence Record ID:96295
Long-form Identifier:1:3:96295:9
GUID (UUID V4):0
Nearest other occurrences of Hornblende Root Name Group
2.0km (1.2 miles) ⓘPelton's Quarry, Portland, Middlesex County, Connecticut, USA
3.3km (2.0 miles) ⓘGreat Hill cobalt mines, Cobalt, East Hampton, Middlesex County, Connecticut, USA
3.8km (2.3 miles) ⓘWalden Gem Quarry, Portland, Middlesex County, Connecticut, USA
4.5km (2.8 miles) ⓘCase Quarries, Portland, Middlesex County, Connecticut, USA
7.9km (4.9 miles) ⓘWorth and Selden Quarries (Victoria Quarry), East Hampton, Middlesex County, Connecticut, USA
16.5km (10.2 miles) ⓘState Route 9 rock cuts, Haddam, Middlesex County, Connecticut, USA
30.6km (19.0 miles) ⓘUS Route 6 Willimantic Bypass expressway road cuts, Coventry, Tolland County, Connecticut, USA
31.6km (19.6 miles) ⓘEast Main Street construction site, Waterbury, New Haven County, Connecticut, USA
38.4km (23.9 miles) ⓘHoadley Point Quarries, Guilford, New Haven County, Connecticut, USA
38.9km (24.2 miles) ⓘMansfield Hollow Dam, Windham, Windham County, Connecticut, USA
References
 
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